Rapid black hole growth at the dawn of the Universe: a super-Eddington quasar at z=6.6

doi:10.1093/mnras/stz134

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	Rapid black hole growth at the dawn of the Universe: a super-Eddington quasar at z=6.6
	Tang, Ji-Jia 2,3,4; Goto, Tomotsugu 5; Ohyama, Youichi 2; Jin, Chichuan 6; Done, Chris 1; Lu, Ting-Yi 5; Hashimoto, Tetsuya 5; Eser, Ece Kilerci 5,7; Chiang, Chia-Ying 5; Kim, Seong Jin 5
刊名	MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
	2019-04-01
卷号	484 期号:2 页码:2575-2586
关键词	galaxies: active galaxies: high-redshift galaxies: nuclei quasars: emission lines quasars: supermassive black holes
ISSN号	0035-8711
DOI	10.1093/mnras/stz134
英文摘要	We present the analysis of a new near-infrared (NIR) spectrum of a recently discovered z = 6.621 quasar PSO J006 + 39 in an attempt to explore the early growth of supermassive black holes (SMBHs). This NIR (rest-frame ultraviolet, UV) spectrum shows blue continuum slope and rich metal emission lines in addition to Ly alpha line. We utilize the Mg II line width and the rest-frame luminosity L-3000 angstrom to find the mass of SMBH (M-BH) to be similar to 10(8) M-circle dot, making this one of the lowest mass quasars at high redshift. The power-law slope index (alpha(lambda)) of the continuum emission is -2.94 +/- 0.03, significantly bluer than the slope of alpha(lambda) = -7/3 predicted from standard thin disc models. We fit the spectral energy distribution (SED) using a model which can fit local SMBHs, which includes warm and hot Comptonization powered by the accretion flow as well as an outer standard disc. The result shows that the very blue slope is probably produced by a small radial (similar to 230 gravitational radius, R-g) extent of the standard accretion disc. All plausible SED models require that the source is super-Eddington (L-bol/L-Edd greater than or similar to 9), so the apparently small disc may simply be the inner funnel of a puffed up flow, and clearly the SMBH in this quasar is in a rapid growth phase. We also utilize the rest-frame UV emission lines to probe the chemical abundance in the broad-line region (BLR) of this quasar. We find that this quasar has super solar metallicity through photoionization model calculations.
资助项目	Ministry of Science and Technology of Taiwan (MoST)[105-2112-M-007-003-MY3] ; MoST of Taiwan[106-2112-M-001-008-] ; MoST of Taiwan[107-2119-M-001-026-] ; Hundred Talents Program of the Chinese Academy of Sciences ; National Natural Science Foundation of China[11873054] ; Science and Technology Facilities Council (STFC)[ST/P000541/1] ; TUBITAK-BIDEB through 2218 program
WOS关键词	EMISSION-LINE RATIOS ; X-RAY EXCESS ; IRON EMISSION ; ABUNDANCE RATIOS ; REDSHIFT ; EVOLUTION ; DISC ; METALLICITIES ; CONSTRAINTS ; CONTINUUM
WOS研究方向	Astronomy & Astrophysics
语种	英语
出版者	OXFORD UNIV PRESS
WOS记录号	WOS:000462302600081
资助机构	Ministry of Science and Technology of Taiwan (MoST) ; Ministry of Science and Technology of Taiwan (MoST) ; MoST of Taiwan ; MoST of Taiwan ; Hundred Talents Program of the Chinese Academy of Sciences ; Hundred Talents Program of the Chinese Academy of Sciences ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Science and Technology Facilities Council (STFC) ; Science and Technology Facilities Council (STFC) ; TUBITAK-BIDEB through 2218 program ; TUBITAK-BIDEB through 2218 program ; Ministry of Science and Technology of Taiwan (MoST) ; Ministry of Science and Technology of Taiwan (MoST) ; MoST of Taiwan ; MoST of Taiwan ; Hundred Talents Program of the Chinese Academy of Sciences ; Hundred Talents Program of the Chinese Academy of Sciences ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Science and Technology Facilities Council (STFC) ; Science and Technology Facilities Council (STFC) ; TUBITAK-BIDEB through 2218 program ; TUBITAK-BIDEB through 2218 program ; Ministry of Science and Technology of Taiwan (MoST) ; Ministry of Science and Technology of Taiwan (MoST) ; MoST of Taiwan ; MoST of Taiwan ; Hundred Talents Program of the Chinese Academy of Sciences ; Hundred Talents Program of the Chinese Academy of Sciences ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Science and Technology Facilities Council (STFC) ; Science and Technology Facilities Council (STFC) ; TUBITAK-BIDEB through 2218 program ; TUBITAK-BIDEB through 2218 program ; Ministry of Science and Technology of Taiwan (MoST) ; Ministry of Science and Technology of Taiwan (MoST) ; MoST of Taiwan ; MoST of Taiwan ; Hundred Talents Program of the Chinese Academy of Sciences ; Hundred Talents Program of the Chinese Academy of Sciences ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Science and Technology Facilities Council (STFC) ; Science and Technology Facilities Council (STFC) ; TUBITAK-BIDEB through 2218 program ; TUBITAK-BIDEB through 2218 program
内容类型	期刊论文
源URL	[http://ir.bao.ac.cn/handle/114a11/25747]
专题	中国科学院国家天文台
通讯作者	Tang, Ji-Jia
作者单位	1.Univ Durham, Ctr Extragalact Astron, Dept Phys, South Rd, Durham DH1 3LE, England 2.Acad Sinica, Inst Astron & Astrophys, Taipei 10617, Taiwan 3.Natl Taiwan Univ, Grad Inst Astrophys, Roosevelt Rd, Taipei 10617, Taiwan 4.Australian Natl Univ, Res Sch Astron & Astrophys, Cotter Rd, Weston, ACT 2611, Australia 5.Natl Tsing Hua Univ, Inst Astron, 101 Kuang Fu Rd, Hsinchu 30013, Taiwan 6.Chinese Acad Sci, Natl Astron Observ, A20 Datun Rd, Beijing 100101, Peoples R China 7.Istanbul Univ, Fac Sci, Dept Astron & Space Sci, TR-34119 Istanbul, Turkey
推荐引用方式 GB/T 7714	Tang, Ji-Jia,Goto, Tomotsugu,Ohyama, Youichi,et al. Rapid black hole growth at the dawn of the Universe: a super-Eddington quasar at z=6.6[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2019,484(2):2575-2586.
APA	Tang, Ji-Jia.,Goto, Tomotsugu.,Ohyama, Youichi.,Jin, Chichuan.,Done, Chris.,...&Kim, Seong Jin.(2019).Rapid black hole growth at the dawn of the Universe: a super-Eddington quasar at z=6.6.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,484(2),2575-2586.
MLA	Tang, Ji-Jia,et al."Rapid black hole growth at the dawn of the Universe: a super-Eddington quasar at z=6.6".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 484.2(2019):2575-2586.